| Acronym | Meaning |
| EIC | Earth Information System |
| DFD | Data Flow Diagram |
| DIFAX | Digital Facsimile Map |
| NPC | National Processing Centers |
| VLSI | Very Large Scale Interface |
| ELVD | Every Launch Vehicle Directorate |
| DODS | Distributed Ocean Data System |
| SMOW | Standard Mean Ocean Water |
| PDU | Protocol Data Unit |
| CCID | Confidential Chemicals Identification System |